parse-fmt-str 2.0.0

parsin format strings since 1997
Documentation 
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use parse_fmt_str::{
    parse_fmt_str, Align, Argument, Count, Precision, PossibleFormatSlot, Sign, Type,
};

#[test]
fn hello_fmt_str() {
    let formatstr = parse_fmt_str("Hello, {:}!").unwrap();
    assert_eq!(formatstr.text, vec!["Hello, ", "!"]);
    assert_eq!(formatstr.maybe_fmt.len(), 1);
    assert!(match &formatstr.maybe_fmt[0] {
        PossibleFormatSlot::FormatSlot(fmt) => {
            assert!(fmt.arg.is_none());
            assert!(fmt.fmt_spec.is_some());
            let fmt_spec = fmt.fmt_spec.as_ref().unwrap();
            assert!(fmt_spec.fill.is_none());
            assert!(fmt_spec.align.is_none());
            assert!(fmt_spec.sign.is_none());
            assert!(!fmt_spec.alternate);
            assert!(!fmt_spec.pad_with_zeros);
            assert!(fmt_spec.width.is_none());
            assert!(fmt_spec.percision.is_none());
            assert_eq!(fmt_spec.kind, Type::None);
            true
        }
        _ => false,
    });
}

#[test]
fn escaped_brackets() {
    let formatstr = parse_fmt_str("abc{{123}}xyz").unwrap();
    assert_eq!(formatstr.text, vec!["abc", "123", "xyz"]);
}

#[test]
fn blank() {
    let formatstr = parse_fmt_str("{:}").unwrap();
    assert_eq!(formatstr.text, vec!["", ""]);
    assert!(match &formatstr.maybe_fmt[0] {
        PossibleFormatSlot::FormatSlot(fmt) => {
            assert!(fmt.arg.is_none());
            assert!(fmt.fmt_spec.is_some());
            let fmt_spec = fmt.fmt_spec.as_ref().unwrap();
            assert!(fmt_spec.fill.is_none());
            assert!(fmt_spec.align.is_none());
            assert!(fmt_spec.sign.is_none());
            assert!(!fmt_spec.alternate);
            assert!(!fmt_spec.pad_with_zeros);
            assert!(fmt_spec.width.is_none());
            assert!(fmt_spec.percision.is_none());
            assert_eq!(fmt_spec.kind, Type::None);
            true
        }
        _ => false,
    });
}

#[test]
fn all_in_one() {
    let formatstr = parse_fmt_str("Hello, {{{argument:-^+#0wide$.*X?}}}!").unwrap();
    assert_eq!(formatstr.text, vec!["Hello, ", "", "", "!"]);
    assert_eq!(formatstr.maybe_fmt.len(), 3);
    assert!(match &formatstr.maybe_fmt[1] {
        PossibleFormatSlot::FormatSlot(fmt) => {
            assert!(match fmt.arg.as_ref().unwrap() {
                Argument::Identifier(str) => {
                    assert_eq!(str, "argument");
                    true
                }
                _ => false,
            });
            assert!(fmt.fmt_spec.is_some());
            let fmt_spec = fmt.fmt_spec.as_ref().unwrap();
            assert_eq!(fmt_spec.fill.as_ref().unwrap(), &'-');
            assert_eq!(fmt_spec.align.as_ref().unwrap(), &Align::Center);
            assert_eq!(fmt_spec.sign.as_ref().unwrap(), &Sign::Positive);
            assert!(fmt_spec.alternate);
            assert!(fmt_spec.pad_with_zeros);
            assert!(match fmt_spec.width.as_ref().unwrap() {
                Count::Parameter(param) => {
                    match param {
                        Argument::Identifier(wide) => wide == "wide",
                        _ => false,
                    }
                }
                _ => false,
            });
            assert_eq!(
                fmt_spec.percision.as_ref().unwrap(),
                &Precision::SpecifiedPrecision
            );
            assert_eq!(fmt_spec.kind, Type::DebugUpperHex);
            true
        }
        _ => false,
    });
}